Old Navy to Onzie leggings size
The short answer
Old Navy XXS is Onzie X/S by the two brands' own charts. 6 of 6 Old Navy sizes land on a different label at Onzie.
Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.
| Old Navy | Old Navy builds it for | Onzie, by chart | Same label | Onzie builds it for | Onzie also prints |
|---|---|---|---|---|---|
| XXS | waist 24 in, hip 34.5 in | X/S | not published | waist 24 to 26 in, hip 33 to 35 in | US numeric 0-2 |
| XS | waist 25 to 26 in, hip 35.5 to 36.5 in | X/S | not published | waist 24 to 26 in, hip 33 to 35 in | US numeric 0-2 |
| S | waist 27 to 28 in, hip 37.5 to 38.5 in | S/M | X/S | waist 26 to 28 in, hip 36 to 38 in | US numeric 2-6 |
| M | waist 29 to 30 in, hip 39.5 to 40.5 in | M/L | S/M | waist 28 to 31 in, hip 38 to 40 in | US numeric 6-8 |
| L | waist 31.5 to 33.5 in, hip 42 to 44 in | L/L | M/L | waist 31 to 33 in, hip 40 to 42 in | US numeric 10-12 |
| XL | waist 36.3 to 39 in, hip 46.5 to 49 in | 1X or XL | XL | waist 38 to 40 in, hip 46 to 48 in | US numeric 16-18 |
| XXL | waist 42 in, hip 51.5 in | not made | not published | not published | not published |
| 2X | waist 42 to 44.3 in, hip 51.5 to 53.8 in | not made | not published | not published | not published |
| 3X | waist 46.6 to 49 in, hip 56.1 to 58.5 in | not made | not published | not published | not published |
| 4X | waist 51.5 to 54 in, hip 61 to 63.5 in | not made | not published | not published | not published |
What wearers say
Charts describe a garment. People who own both brands describe a fit, and their answer ranks above this table once five of them stand behind it. Pick your size in the converter to see whether there are enough yet.
Sources
- Old Navy size guide, read on 2026-09-17. Old Navy on TrueToSize
- Onzie size guide, read on 2026-09-18.